Bump pymdown-extensions in the pip group across 1 directory

Bumps the pip group with 1 update in the / directory: [pymdown-extensions](https://github.com/facelessuser/pymdown-extensions).


Updates `pymdown-extensions` from 10.11.2 to 10.16.1
- [Release notes](https://github.com/facelessuser/pymdown-extensions/releases)
- [Commits](facelessuser/pymdown-extensions@10.11.2...10.16.1)

---
updated-dependencies:
- dependency-name: pymdown-extensions
  dependency-version: 10.16.1
  dependency-type: indirect
  dependency-group: pip
...

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Author: dependabot[bot]